Author Topic: A65 front brake  (Read 1385 times)

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barney.66

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A65 front brake
« on: 26 March, 2022, 07:18:25 »
Morning all,
I have a single leading shoe 1/2 width hub on my A65L that I am starting to prepare for restoration and I would like to change for a twin that I already have.
My problem is the single has a bolt on brace and the twin is a slot in the casting and the fork bottoms do not have this piece on to go in the slot, my fork bottoms are the ones with the screw in spindle as apposed to thé the bolt on bottoms.
I am guessing that plenty of people have done this but what is the answer / best way to do it, is it modify the twin leading plate or change forks ? I do have a full width hub for the twin but this is for bolt on bottoms.
Just to confirm I’m not after a completely original bike rather than a very good rider as I like and want it, not going to show it just ride it,
look forward to your replies and ideas
Thanks barney

DAVE BRADY

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Re: A65 front brake
« Reply #1 on: 26 March, 2022, 09:52:05 »
Hi Barney,

I suspect that the only way forward is to change the forks.  Many who fit the TLS to an A10 use the clamp type forks and modify the piece for the slot as the A10 one does not quite protrude enough.  There is a TLS brake that will fit the A65 hub that you have as the hub is the same as Gold Star and there a few available.
However, having just said that you may have to change the forks I have found this on the BritBike Forum.

Dave.
« Last Edit: 26 March, 2022, 09:54:55 by DAVE BRADY »

Bess

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Re: A65 front brake
« Reply #2 on: 26 March, 2022, 09:53:11 »
Hi,
     I have always changed the forks rather than modify the plate, I wouldn't trust the plates I have seen modified. You may need to change the yokes and wheel spindle.

I start with the sliders Triumph or BSA, (there are different designs due to the mudguard changes and some out there aren't the best so choose carefully). I then buy new stanchions, bushes etc.

Best wishes...

idie

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Re: A65 front brake
« Reply #3 on: 26 March, 2022, 09:53:37 »
You can buy a Edie Dow type twin leading shoe brake for about £800 or change the fork legs for ones with the bolt on caps. The full width Triumph BSA style brake with the twin leading shoes will then fit, probably a lot cheaper.

Mike Farmer

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Re: A65 front brake
« Reply #4 on: 26 March, 2022, 10:22:46 »
 :) :) :) :)

May I suggest that you simply have a piece welded onto current fork let. I have not ever done this but imagine the actual welding is a 10 minute job. It will certainely be the quickest and least expensive way to go. You can probably do it in situ.

If you would like a pic to assist in positioning, I have a fork leg on the bench at the moment an quite happy to send it. PM me your fone no and I'll do it immediately if not sooner.

Mike 8) 8) 8) 8)

idie

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Re: A65 front brake
« Reply #5 on: 26 March, 2022, 11:50:02 »
When I fitted a twin leading shoe brake plate onto my sons 1960 Shooting Star I built up the fork leg anchor with weld with the wheel out then ground it into shape. That was 5 years ago, still working fine.

Mike Farmer

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Re: A65 front brake
« Reply #6 on: 26 March, 2022, 12:21:21 »
 :) :) :)

Hi That obviously works. Did you find any minor "bulging" inside the leg at the weld point.

Mike 8) 8) 8) 8)

barney.66

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Re: A65 front brake
« Reply #7 on: 26 March, 2022, 12:54:37 »
Thanks for your replies, Sounds like the weld on the fork leg is a good idea, might see if I can get a spare set first,
sent you a pm Mike

Thanks barney

idie

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Re: A65 front brake
« Reply #8 on: 26 March, 2022, 13:13:46 »
I never had a problem when welding. Mindful of the thickness of the leg I build up in stages so no excess heat.

barney.66

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Re: A65 front brake
« Reply #9 on: 26 March, 2022, 13:22:35 »
What an excellent forum this is with some really helpfully people, I post a question this morning 8 replies and a pic sent to my phone already
 Thanks lads

MGI

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Re: A65 front brake
« Reply #10 on: 26 March, 2022, 15:06:58 »
Ironically I have the self same problem with my B33 - I have changed the lower fork legs for the type where the right hand leg has the square protrusion to locate in the TLS assembly - problem (I think) is that the protrusion only enters the square groove about half way. Given that the spindle has grooves at each end to positively locate the retaining axle clamps it doesn't appear that the hub position can be laterally adjusted. There is a large nut on the right hand side of the spindle which secures the brake drum to the spindle as it pushes it against a shoulder in the depths of the spindle but I cannot see that loosening that would help although it would allow the locating groove to move further over the protrusion but not in a positive or permanent way. It seems that one solution would be to extend the length of protrusion by methods discussed already, or build up the ally groove, as also discussed previously. My question would be, would welding the steel extension 'en situ' cause any problems with the electrical system? I say this because it would be more expedient  to remove the one axle clamp and rotate the fork leg to provide easy access to the spigot than having to dismantle the whole lot again! Equally, it would be quite simple to remove the wheel to allow the slot to be built up. Worcester (where I live) has a plethora of specialist ally welding companies located within or close to the city!

idie

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Re: A65 front brake
« Reply #11 on: 26 March, 2022, 18:39:34 »
I believe the problem can be due to fitting a twin leading shoe brake plate in a single shoe hub. I think if you fit the spindle from a twin leading shoe hub or one from e Triumph it will move the whole thing closer to the fork leg. Personally I think it is easier to build up the peg on the fork leg.

Mike Farmer

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Re: A65 front brake
« Reply #12 on: 26 March, 2022, 20:18:11 »
 :) :) :)

I go along with that. Drop the wheel undo mudguard fixing, turn the fork leg so the "lump" is easily accessible, weld and grind as required. reverse the process. If you have a migger about an hours work.

Mike  8) 8) 8)

DAVE BRADY

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Re: A65 front brake
« Reply #13 on: 26 March, 2022, 20:25:23 »
Hi,

Even with the proper hub the 'boss' does not quite reach fully into the slot.  If you look at A65 forks for this brake the lug is built up quite a bit compared with the A10.  I have done some welding on my bike and to be on the safe side I disconnected the alternator the electronic ignition and the battery.  Reconnected and all well.

Dave.

MGI

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Re: A65 front brake
« Reply #14 on: 29 March, 2022, 09:08:17 »
Before total commitment would anyone care to comment on the advisability of leaving the hub restraining spigot as it is given that it is over halfway into the groove? It would appear that it is virtually impossible to disconnect them without removing the wheel.